That's what happens when you've only got one of something!
No it doesn't.
It would be better for an airline if it does only have one of a new type in their fleet.
If an airline is having problems with a new aircraft type then the more of that type they have in their fleet the more problems and cancellations they will have.
If the problem is systemic then the more aircraft you have the more problems you are going to have.
Try dealing with multiple cancellations especially at this time of the year.